I the oddest thing for me is that Satoshi spent all this time hiding and then posts a huge blog to prove it's him.
https://www.youtube.com/watch?v=dZNtbAFnr-0
If he is Satoshi, and what he's saying about being forced to reveal his identity now is true, it would make sense to provide the minimum that the threateners would accept, knowing that the community wouldn't buy it. That video is really odd. (FWIW I don't believe this claim is or isn't true, I'm waiting for more info.)
He was forced to. He doesn't want to be public, and he wishes he didn't have to be.
He may be or not be Bitcoin's inventor (I strongly suspect he isn't) but in both cases he really wanted to be known, at least starting in mid-2015.
What evidence is there for this?